Norwegian singer who was part of the pop group ABBA and sang on their most famous tracks, like "Mamma Mia" and "Dancing Queen."
Her marriage to a German prince in 1992 resulted in her receiving the formal title Her Serene Highness Princess Anni-Frid Synni Reuss of Plauen.
Her idol is jazz vocalist Ella Fitzgerald.
She was raised by her grandmother after her mother died of kidney failure.
She married Ragnar Fredriksson on April 3, 1963, Benny Anderson on October 6, 1978, and Prince Heinrich Ruzzo Reuss of Plauen on August 26, 1992. She and Reuss remained married until his death in 1999. She and Fredriksson had a daughter named Ann and a son named Hans.